Potential correlation between epidemiological characteristics and meteorological factors of heatstroke in Wuhan from 2018 to 2023

Abstract

Abstract: Objective To study the epidemic characteristics of heatstroke in Wuhan,and provide a basis for monitoring and early warning. Methods Describe the basic distribution of heatstroke cases in Wuhan from 2018 to 2023,study the relationship between heatstroke and meteorological factors,and reveal the patterns of heatstroke. Results From June to September 2018 to 2023,a total of 4 156 cases of heatstroke were reported in Wuhan,including 53 deaths,the mortality rate was 1.3%,showing a gradually decreasing trend. Age ≥65 years old and high temperature days were risk factors for severe heatstroke（both P<0.05）,while females,severe heatstroke,and ≥65 years old were risk factors for heatstroke death（all P<0.05）. Age played a crucial role in the occurrence of heatstroke,severe heatstroke,and death. Heatstroke occurred most frequently in July-August,and the peak of cases occurred at the beginning of the heatwaves. High temperature exposure could quickly cause heatstroke. The risk of heatstroke significantly increased during the heatwave period compared to the reference period（RR>1）,and the cumulative risk of heatstroke increased with the duration of the heatwave. The cases of heatstroke were positively correlated with daily average temperature （r=0.855,P<0.01）,daily maximum temperature（r=0.812,P<0.01）,and number of days with high temperatures（r=0.667,P<0.01）,and negatively correlated with daily relative humidity（r=-0.379,P<0.01）. The thresholds for heatstroke caused by daily maximum temperature and daily average temperature were 34.49 ℃（95%CI：33.92-35.13,R²=0.554） and 30.66 ℃（95%CI：29.47-31.70,R²=0.666）,respectively. After breaking the above thresholds,the number of heatstroke cases increased significantly. Conclusion High temperature days and age ≥65 years old are risk factors for severe heatstroke,while females,severe heatstroke,and ≥65 years old are risk factors for heatstroke death. The thresholds for heatstroke caused by daily maximum temperature and daily average temperature are 34.49 and 30.66 ℃,respectively. The risk of heatstroke significantly increases during high temperature heatwaves.

Key words: High temperature, Heatstroke, Death, Meteorology, Threshold

CLC Number:

R181.3⁺4

HE Fang, ZHANG Cheng, CHEN Zhenlong, LIANG Jiaojun. Potential correlation between epidemiological characteristics and meteorological factors of heatstroke in Wuhan from 2018 to 2023. [J]OCCUPATION AND HEALTH, 2025, 41(10): 1395-1400.

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